Been reviewing some aircraft numbers and their are several airlines in the US that fly exclusive 100% Boeing built airplanes. (NO McDonnell's, Airbus's or other makers).

Continental Airlines stands out in this survey......After retiring their DC-10's and MD-80's, they became exclusively Boeing with 367 and 89 on order. Then there's Southwest Airlines with the worlds largest fleet of any single model carrier, with over 500 737's.

Now as for AirTran: I can't really say they're all Boeing since the 717 is not a true buy-product of a Boeing design. So this puts Hawaiian Airlines out of the picture as well.

Aloha Airlines and North American Airlines are all Boeing and soon to be joined by Alaska Airlines when they retire all of their MD-80's and replacing them with 737-800's

Both American and Delta still have a large inventory of MD-80's, so I expect it will be some time before they become all Boeing or even jump the fence as did United, Northwest and US Airways and buy Airbus.

I thought ATA was becoming all Boeing when they retire their final L-1011's but then they purchased 6 ex-NW DC-10's.

As for "Foreign Carriers......Ryanair is the only one I can think of that's Mr. Boeing....Qantas, ANA, British Airways and even EasyJet jumped the fence and bought Airbus's. Japan Airlines disposed of their MD-11's and DC-10's but took on A300's when they purchased JAS. Even long-time loyalist like China Airlines turned in their plaque and purchased A330's.

One of the biggest surprises was Singapore Airlines. I thought for certain that SQ will be a life-long partner with Boeing when they invested heavily in 747's and triple-7's, and disposed of their A340-300. But a short time later, they returned to Airbus and bought A340-500's for their long haul flights to North America. Now they are the launch customer of the A380 so this loyality have forever been broken.

Quoting 747Dreamlifter (Thread starter):One of the biggest surprises was Singapore Airlines. I thought for certain that SQ will be a life-long partner with Boeing when they invested heavily in 747's and triple-7's, and disposed of their A340-300. But a short time later, they returned to Airbus and bought A340-500's for their long haul flights to North America. Now they are the launch customer of the A380 so this loyality have forever been broken.

SQ although their fleet was dominated by Boeing aircraft always had aircraft from other manufacturers not only the A340 but also the A310 and Dc10. They bought what is best for their needs whether it is Airbus or Boeing. Even if the 747 is being replaced with the A380 they still have the 777 and the 787 and will be a loyal Boeing customer but not exclusively.

Even with a strong Airbus fleet you could be loyal to Boeing. LH for example operated Boeing aircraft for nearly 5 decades and in the late 60s and early 70s they had an all Boeing fleet. LH pushed Boeing to build the 737 because they did not want to get the Dc 9 and were the launch customer for the 747-8I and indirectly (via Condor) for the 757-300. If you mean airlines that are exclusively Boeing I guess they will be some smaller airlines (Icelandair maybe...) but for airlines that have reached a size it is not the best choice to become too independant, I think CO is the only airline in their category with an all Boeing fleet. Also one manufacturer can not cover all needs e.g. Boeing has no regional aircraft so that airlines that operate 737s,757s,767s and 777s in their mainline fleet always have a need for Embraers or Bombardiers.

It will forever be a McDonnell Douglas MD 80 , Boeing MD 80 sounds so wrong

To be honest, the title of this thread is somewhat misleading. There are very few airlines "loyal" to Boeing (or any other manufacturer at that), in order to be 100% loyal, the whole fleet, including the fleet throughout the history of the airline, has to be Boeing. Just because an airline has an all Boeing fleet today, does not mean they are 100% loyal to them. Very few airlines have only had aircraft from one manufacturer throughout their history.